The driver for SD/MMC just been accepted in linux mainline! ;) Soon we'll can to use linux mainline in sunxi boards. ;D
https://groups.google.com/forum/?fromgroups=#!msg/linux-sunxi/f7veDFHdJNA/L7JO9fRa3ekJ (https://groups.google.com/forum/?fromgroups=#!msg/linux-sunxi/f7veDFHdJNA/L7JO9fRa3ekJ)